(2) Set (Affliction): Corruption has a chance to generate a soul shard whenever it deals damage.
(2) Set (Demonology): Demonbolt and Demonwrath have a chance to reset the cooldown of Call Dreadstalkers.
(2) Set (Destruction): Incinerate has a 100% chance to generate 1 additional Soul Shard Fragment.
(4) Set (Affliction): Spending a Soul Shard has a chance to grant you 10% Haste for 8 sec.
(4) Set (Demonology): When you cast Call Dreadstalkers, you gain 10% Haste for 5 sec.
(4) Set (Destruction): Chaos Bolt always gains maximum benefit from your Mastery: Chaotic Energies.
Diabolic Helm is one of 6 pieces of Diabolic Raiment, alongside Diabolic Shroud, Diabolic Gloves and Diabolic Leggings and others. Bonuses activate at 2 pieces and 4 pieces equipped.
Related
Diabolic Helm Game Data
Appearance
In the Appearances collection, Diabolic Helm is listed as Boss Drop. Appearance IDs: 33203, 33149, 33096, 33194. 2 other items wear the same appearance:
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Diabolic Helm Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Diabolic Helm suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Similar Items
The 10 items nearest to Diabolic Helm (item level 50) in item level among Armor > Cloth, Head slot, from item level 39 to 60.
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Diabolic Helm Fits
Other Items Named Diabolic Helm
2 other items in the current build are also called Diabolic Helm. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 147183 (147178 to 147188) were usually added in the same batch as Diabolic Helm: the same quest line, zone, vendor or reward set.